Headlight having a pivoting elliptical reflector and a fixed lens, for producing an offset or verge beam

A headlight for a motor vehicle, which is designed so as to produce at least one light beam referred to as an offset beam in order to improve the lighting effect when the vehicle is passing along a verge, the headlight being of the type comprising an optical system which includes, considered from the rear towards the front generally along a horizontal longitudinal reference axis, a reflector of the elliptical type, a light source disposed close to a first focus of the reflector, and a convergent lens element, the headlight being further of the type in which at least the reflector and the light source are mounted for pivoting movement about a substantially vertical axis with respect to a fixed support of the vehicle, as a function of the steering angle of the steerable wheels of the vehicle, thereby defining a movable optical axis with respect to the longitudinal axis,

• wherein the lens element is fixed with respect to the support, and the lens element comprises a lateral portion disposed beside the longitudinal axis in an angular sector which is able to be swept by the movable optical axis, and which is adapted to cause the offset beam to be modified as a function of the offset angle defined between the movable optical axis and the longitudinal axis.